Factors affecting dynamic electrical manipulation of menisci

Graham S. Wright, Philip T Krein, John C. Chato

Research output: Contribution to journalArticlepeer-review

Abstract

The dynamics of a conductive meniscus subjected to an external field are examined with a view toward drop-on-demand applications. A low-order model suitable for exploring parametric effects is developed. Equilibrium and stability criteria are derived for the purpose of estimating electric field requirements. The criteria are expressed in terms of dimensionless pressures due to electric stress, gravity, and hydrostatic head, normalized to surface tension pressure. Eigenvalues of the linearized model yield a formula for characteristic frequency analogous to Rayleigh’s formula for a free drop and, in addition, indicate that most liquids will show underdamped behavior. Requirements for critical damping are derived and illustrated with root locus plots.

Original languageEnglish (US)
Pages (from-to)103-112
Number of pages10
JournalIEEE Transactions on Industry Applications
Volume29
Issue number1
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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